Sieve



Patented duly 2d, 1923.

'iw il im l?? lili il. blao SIEVE.

Application filed April 18, 1922.

tion.

This invention relates to improvements in sieves and has for its objectto provide an improved` sieve more specifically adapted to be operatedin connection with threshers.

Further objects are to provide a sieve which consists of a plurality ofangle shaped sifting members pivotally mounted in a framework anddesigned to be set at a suitable inclination.

Still `further objects are to provide an improved sieve which is simplein construe* tion, not liable to go out of repair and generally adaptthe several parts to better perform the functions required ofi them.

ln the drawings:

Figure 1 is a perspective view. of the improved sieve.

Figure 2 is a t-ransverse section showing the sifting members in closedposition.

Figure 3 is a transverse section showing the sifting members in inclinedposition.

Figure 4L is an enlarged cross section through one of the siftingmembers.

Figure 5 is a perspective detail of one of the sifting members.

Referring to the drawings:

A represents the improved sieve which comprises a frame 10 rectangularin cross section and designed to be separated in two parts by a metalmember or web 11. Mounted in the end members and extending through theweb 11 are a. plurality of spindles 12 suitably spaced therefrom anddesigned to carry the sifting members i3. Each of the sifting members Bis mounted on the spindles 12 by means of rivets 14 and 15. lf desired,the rivet 15 may extend through the spindle 12 so that the siftingmember will move together with the spindle 12. Each of the siftingmembers B consists of an L-shapedplate 16 provided with a plurality ofperforations 17 and 17 through which the line grain is designed to pass.The metal strips 13 are each formed with an extension 17l which isturned at right angles thereto and extends downwardly. t ach of the l.shaped members 16 carries a downward perforated extension 17 Serial No.554,942'.

and all downward extensions 1T ot' th straps 13 are designed 'to beconnecte" t a transverse rod 18 through a suitable nie dium 19. The rod18, is formed at one end with a shanlr 2O suitably* secured thereto andwhich extends through a fixed internally threaded collar 21. The collar21 i lixedly carried by the fran." l0 and rotary movement of the shanlz:2() within the threaded colla 1 21 causes the rod 1S to move forwardlyor backward according to the direction in which the shank is turnedwithin the collar. The outer end of the shank 2O is provided with a handwheel by means of which the rod may be suitably operated. rlhe shank 20is connected to the rod 18 by means of a connecting ring 28 which beirfixed to the rod 18 loosely engages the enn of the shank 20. lf desiredjthe end of the shank 2O will be formed with an enlarged portion whichcould be loosely retained by means of a flange provided on theconnecting ring 23. The space formed between the frameworg 10 and 'thelirst and last of the series of sifting members B may be bridged bymeans of delcctor plates 24: and over which the grain and chaff is fedon to the sifting members B.

When in operation, the hand wheel 22 is manipulated in order to bringthe sifting members B to the desired inclination, as shown in Figure 3.W hen the threshing machine is in operation, the draft caused by theblower will be deflected by the inclined plates 16 of the siftingmembers B and will force the chaff out while the heavier grain will fallthrough the sieve on to the collecting pan.

ylt will be seen that by reason of the perforations 17 and 17, the airwill pass through the body and the extension portion in a directionsubstantially perpendicular to their surfaces which will tend to raiseall light material from the plate. By the proper regulating of theinclination of the plate 16 through the instrumentality of the rod 18,the grain will not be hindered from passing through the perforations andalso through whatever space there may be found desirable to leavebetween the body of the plates and the angular extension of the adjacentplate.

The pressure caused by the various sources of air against one anotherwill eiectively destroy any eddies that may form between theperforations, while the component current thus produced will be directedin an upward and forward dirction so as to carry the chal'l' away, whichcustomarily forms on the plates.

As many changes could be made in the above construction and many widelyditlei ent embodiments oi my invention 'within the scope of the claiins,constructed without departing from the spirit or scope thereof7 it isintended that all matter contained in the accompanying specification anddrawings shall be interpreted as illustrative and not in a limitingsense.

What I claim as my invention is:

l. A sieve comprising a frame, spaced apart spindles in said fra-ine,supporting plates having angularly bent portions, perr'orations in saidplates and said angular portions substantially perpendicular to theirsurfaces for preventing eddies collecting between the perforations, andmeans connected to said plates tor actuatingl the same.

2. A. sieve comprising a frame, a plurality of spindles spaced in saidiframe, substantially l.shape perforated plates joui'- nalled on saidspindles and arranged to have normally inclined lapping edges, means forconducting air current upward and forward through said plates, and meansto operate the plates and to set them at any desired inclination. f

A sieve comprisinga frame, a plurality of spindles spaced in said frame,substantially `fL-shape perforated plates journalled ou said spindlesand arranged to have normally inclined lapping edges, means for removingthe chaii troni said plates, and an actuating rod operatively associatedwith said plates ifor moving the plates to any desired inclination.

i. The combination with a sieve having a trame, of a plurality of spacedapart spindles secured to the sides or said frame, substantiallyl.-shape plates journalled in said spindles, pertorations in said platesperpendicular to the suri ces of said plates, detlecting membersconnected to the ends of said iframe, a longitudinally extending rodoperatively connected with said plates for setting them at any desiredinclination, and means for conducting air currents through said plate inan upward and forward direction.

ln testimony whereof l have hereunto set my hand.

y ED'VVARD JAMES EVANS. Wlitnesses W. A. BEYNON, AUDREY KNUTTON.

